JPH06476B2 - Constant-speed traveling device for automobiles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle constant-speed traveling device capable of maintaining a vehicle speed at a speed desired by a driver even when the operator releases his / her foot from an accelerator pedal.

[Conventional technology]

In recent years, some automobiles are equipped with a constant-speed traveling device in order to reduce the burden on the driver when traveling at a constant speed on a highway or a road with good flow. When this device is turned on, the throttle opening is automatically adjusted without pressing the accelerator pedal, and the traveling vehicle speed is kept constant at the desired traveling speed set by the driver.

The vehicle constant speed traveling device generally receives a vehicle speed sensor (not shown), a vehicle speed information signal from the vehicle speed sensor, etc., as shown in FIG. 3, and controls all functions of constant speed traveling by a microcomputer. 10, an actuator 3 for adjusting the throttle valve to a set opening by a signal from the control device 10, a main switch 2 which is a power switch for the constant speed traveling device, a vehicle speed setting (set) / deceleration control (coast) switch 11, and a constant switch. A control switch 1 including a high-speed traveling return (resume) / acceleration control (accelerator) switch 12 and a constant-speed traveling cancellation (cancel) switch 13, and various cancel switches 4 for releasing the constant-speed traveling when turned on for failsafe. (Stop lamp switch 4a, parking brake switch 4b, clutch switch for M / T vehicles c, it is composed of a neutral start switch 4d, etc.) of the A / T cars.

[Problems to be solved by the invention]

However, in the conventional constant-speed traveling device for automobiles, the main switch 2 which is a power switch of the constant-speed traveling device and the set switch 11 of the control switch 1 for setting the vehicle speed for constant-speed traveling are separated from each other. It is provided. That is, as shown in FIG. 4, the main switch 2 is often installed on the instrument panel 9 of the automobile, and the set switch 11 is on the steering wheel 8 (FIG. 3) at hand for easy operation. Often installed on a combination switch.

As a result, the driver has to turn on the distant main switch 2 and then turn on the set switch 11 at hand to perform constant-speed traveling, which is inconvenient for the driver to perform constant-speed traveling.
Further, it has been considered to incorporate the main switch 2 into a combination switch at hand, but there are drawbacks such as no space and complicated wiring, which is not always practical.

[Means for solving problems]

An object of the present invention is to solve the problems of the conventional constant-speed traveling device, to make the set switch at the driver's hand also have the function of the power supply switch of the constant-speed traveling device, and by the first operation of the set switch. An object of the present invention is to provide an excellent constant-speed traveling device for an automobile that can turn on the power supply of the constant-speed traveling device and can perform the original set operation of the set switch after the second operation.

The present invention for achieving the above object is a constant speed traveling device for maintaining a constant speed of a vehicle by a constant speed traveling control device having a set switch for setting a vehicle speed, wherein a power supply holding circuit is an ignition switch of the vehicle and the above. It is connected to a set switch, and when the set switch is turned on, the control device is connected to a power source, and the ignition switch is turned off.
The control device is disconnected from the power source by the, the delay circuit is connected to the power source holding circuit, and after the set switch is turned on, a voltage falling from the power supply voltage is output with a predetermined time constant, and the set circuit outputs the voltage. A set signal for setting the vehicle speed to the control device when the set switch is turned on in the standby state when the output voltage of the delay circuit becomes equal to or less than a predetermined value. It is characterized by outputting.

Further, in addition to the above configuration, another device of the present invention includes a set time notification device for notifying that the set circuit is in a standby state.

[Work]

In the vehicle constant-speed traveling device of the present invention, when the ignition switch is ON, the constant-speed traveling control device is energized when the set switch is first pushed, and the energized state is maintained even when the set switch is released, and is re-established after a predetermined time. When the set switch is pressed, constant speed traveling can be performed by the constant speed traveling control device. Further, when the ignition switch is turned off, the power supply to the constant speed running control device is stopped, and even if the ignition switch is turned on again, the constant speed running control device is not powered unless the set switch is turned on.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of a main part of an embodiment of a vehicle constant-speed traveling device of the present invention, and 10 shows a constant-speed traveling control device for controlling all functions of the constant-speed traveling. Some and various cancel switches, actuators, and sensors are omitted in this figure. In addition to the control device 10, what is shown in FIG. 1 is an ignition switch 20, a power supply holding circuit 30, a set switch 40,
The delay circuit 50, the set circuit 60, and the constant voltage circuit 7 for lowering the 12V power supply B to the operating voltage Vcc of the control device 10.
Is.

Power supply holding circuit 3 connected to the ignition switch 20
0 is composed of a transistor T ₁ , resistors R ₁ and R ₂ , a diode D ₁ and a relay L, and the diode D
₁ is connected to the set switch 40, and the relay L is connected to the delay circuit 50. The delay circuit 50 includes a capacitor C ₁ ,
It is composed of a diode D ₂ and resistors R ₃ and R ₄ . The set circuit 60 includes transistors T ₂ , T ₃ and a resistor R.
_{5 to} R ₉ and diodes D ₃ and D ₄ and connected to the power supply terminal E of the control device 10 by a 5 V power supply line Vcc connected via the constant voltage circuit 7 to the power supply line F of the delay circuit 50. , Diode D ₃ is set switch 4
0, the diode D ₄ is connected to the output terminal G which is the connection point between the capacitor C ₁ and the resistor R ₄ of the delay circuit 50, and
The collector of the transistor T ₃ is connected to the set terminal S of the control device 10.

The operation of the vehicle constant speed traveling device configured as described above will be described.

When the driver turns on the ignition switch 20 and the vehicle is running, only the power source holding circuit 30 is connected to the power source B, but the relay L is in the OFF state, so the constant speed running device after the delay circuit 50 is energized. It has not been. For example, when the driver presses the set switch 40 installed on the steering wheel to turn it on in order to drive at a constant speed, current flows through the resistors R ₁ and R ₂ through the diode D ₁ of the power supply holding circuit 30. Transistor T ₁
Is turned on, and as a result, the relay L is turned on.

When the relay L is turned on, the power line F of the delay circuit 50 becomes 12
When the set switch 40 is turned off in this state, the voltage of the power supply line F is maintained. Then, when the power supply line F becomes 12V, the power supply line Vcc after the setting circuit 60 becomes 5V through the constant voltage circuit 7, and the power supply terminal E of the constant speed traveling control device 10 is energized.

On the other hand, the voltage at the output terminal G of the delay circuit 50 gradually decreases from 12V to 0V according to the time constant of R ₄ × C ₁ because the capacitor C ₁ has no charge. Therefore, the set circuit 60
Since the transistor T ₂ of the transistor T ₂ is in the OFF state while the voltage of the output terminal G is high and the switch 40 is OFF even if the power supply line Vcc becomes 5 V, the transistor T ₃ has resistors R ₅ , R _{8 in the} transistor T _3. through a base current is supplied to the transistor T ₃ is the collector voltage because the oN state is zero. Therefore, the voltage of the set terminal S of the constant speed traveling control device 10 is also 0, and the constant speed traveling control device 10
Does not receive a set signal.

After a while, when the voltage of the output terminal G falls below 5V, the transistor T ₂ is turned on through the diode D ₄ and its collector voltage becomes 5V. By this time, the constant speed traveling control device 10 has initialized the microcomputer and the like, and is in a standby state (a state in which it operates normally). However, even if the collector voltage of the transistor T ₂ becomes 5V, the transistor T ₃ is turned on at this time.
Since it is in the state, the resistance R ₇ is
_Since it is grounded through ₃ , the voltage of the set terminal S of the constant speed traveling control device 10 remains 0 as well,
No set signal is input. This state is the setting circuit 60
Is in the standby state.

When the set circuit 60 is in this standby state, when the driver is ON by pressing the set switch 40 again, the transistor T ₃ whose base is grounded through the diode D ₃
Turns off. As a result, 5V of the collector voltage of the transistor T ₂ is input to the set terminal S as a set signal through the resistor R ₇ , so that the constant speed traveling control device 10 is set and the vehicle is at the time when the set switch 40 is pressed. It is possible to start constant speed running at a speed.

In the vehicle constant speed traveling device configured as described above, the driver once pushes the set switch 40 to turn it on.
If the switch N is set to N and the set switch 40 is continuously pressed for a predetermined time, the set signal is immediately input to the set terminal S of the constant speed traveling control device 10 when the transistor T ₂ of the set circuit 60 is turned on. . Therefore, if the time constant is determined by the values of the capacitor C ₁ and the resistor R ₄ of the delay circuit 50 and the time constant is shortened, the constant speed traveling device can be turned on and set almost at the same time by pressing the set switch 40 once.

FIG. 2 shows the structure of another embodiment of the constant speed traveling device of the present invention. The device of FIG. 2 is different from the device of FIG. 1 in that the ignition switch 20 and the power supply holding circuit 3 are provided.
0, set switch 40, delay circuit 50, set circuit 6
0, in addition to the configuration of the constant voltage circuit 7, the set circuit 6
The point is that the set time notification device 80 of 0 is provided. In this embodiment, the set time notification device 80 is composed of a logic circuit 5 and a buzzer 6, and the buzzer 6 sounds when the logic circuit 5 outputs. And
The non-inverting input of the logic circuit 5 is connected to the power supply line Vcc,
The inverting input is connected to the collector of the transistor T ₂ of the set circuit 60.

Therefore, in the apparatus of this embodiment, when the set switch 40 is first turned on (Vcc = 5V, transistor T ₂
With the collector voltage of 0 V), an output is output to the logic circuit 5 and the buzzer 6 starts to ring. The output terminal G of the delay circuit 50
When the setting circuit 60 enters the standby state described above, the buzzer 6 stops sounding when the voltage of ₂ decreases to turn on the transistor T ₂ and the collector voltage becomes 5V. Therefore, the driver can know that the buzzer 6 is sounding and that the constant speed traveling device is powered on, and that the constant speed traveling device can be set when the buzzer 6 stops beeping.

In addition to the above-mentioned buzzer, blinking of a lamp, notification by voice, and the like can be considered as the notification means.

Also, although the present configuration has been described with an analog circuit, it is obvious that these configurations can be implemented by software of a microcomputer.

〔The invention's effect〕

As described above, according to the present invention, since the power switch of the constant speed traveling device of the automobile can be eliminated and used as a set switch at the driver's hand, two kinds of constant speed traveling can be performed. You can set the constant speed running at your fingertips by simply pressing the set switch once, and you can set the constant speed running device power ON and constant speed running at once by pressing the set switch once. The number of switches is reduced, which is advantageous in terms of space and cost.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a main part configuration of an embodiment of an automobile constant speed running device of the present invention, and FIG. 2 is a circuit showing a main part configuration of another embodiment of the constant speed running device of the present invention. FIG. 3 and FIG. 3 are explanatory diagrams showing constituent elements of a conventional vehicle constant-speed traveling device, and FIG. 4 is an explanatory diagram showing an example of installation positions of main switches in the conventional device. 6 ... Buzzer, ... Constant voltage circuit, 10 ... Constant speed running control device, 20 ... Ignition switch, 30 ... Voltage holding circuit, 40 ... Set switch, 50 ... Delay circuit, 60 ... Set circuit, 80 ... Set timing notification device.

Claims (2)

[Claims] 1. A constant speed traveling device for maintaining a constant speed of a vehicle by a constant speed traveling control device having a set switch for setting a vehicle speed, the ignition switch of the vehicle being connected to the set switch. When it is turned on, the control device is connected to a power source, and the OF switch of the ignition switch is turned on.
A power supply holding circuit that disconnects the control device from the power supply by F, and the power supply holding circuit is connected to turn on the set switch.
After that, a delay circuit that outputs a voltage that drops from the power supply voltage with a predetermined time constant, and this delay circuit and the control device are connected, and when the output voltage of the delay circuit becomes a predetermined value or less, a standby state is set. And a set circuit that outputs a set signal for setting the vehicle speed to the control device when the set switch is turned on in the standby state. 2. A constant speed traveling device for maintaining a constant speed of a vehicle by a constant speed traveling control device equipped with a set switch for setting a vehicle speed, the ignition switch of the vehicle being connected to the set switch. When it is turned on, the control device is connected to a power source, and the ignition switch OF is turned off.
A power supply holding circuit that disconnects the control device from the power supply by F, and the power supply holding circuit is connected to turn on the set switch.
After that, a delay circuit that outputs a voltage that drops from the power supply voltage with a predetermined time constant, and this delay circuit and the control device are connected, and when the output voltage of the delay circuit becomes a predetermined value or less, a standby state is set. A set circuit that outputs a set signal for setting the vehicle speed to the control device when the set switch is turned on in the standby state; and a set time notification device that notifies that the set circuit is in the standby state. Constant-speed traveling device for automobiles including.